from 2% to 4%, doubles. the amount that you have to pay on a given amount of debt. with the debt so high, that is a lot of money. >> economist robert gineski. >> the problems when they come will appear rapidly. once the increase starts, it will be very difficult to contain it. that is why while we have the rates down, while things are undercontrol, this is the time to implement more positive policies. unfortunately, so far i haven't seen any inclination to move in that direction. >> alice ridlin, budget director for president bill clinton. >> our debt is rising in relation to the economy. we owe half of it to other countries. so if our orn creditors not to mention our domestic creditors lose confidence in us, then we are in deep, deep trouble because interest rates could go up rapidly. that will affect everybody. people buy house, people who buy cars.